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UefiCpuPkg/PiSmmCpuDxeSmm: Impl IsSmmCommBufferForbiddenAddress for MM 

Since all accessible NON-MMRAM memory shall be in ResourceDescriptor
HOBs, check the ResourceDescriptor HOBs to return if the Address is
forbidden or not for MM CPU.

Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Dun Tan <dun.tan@intel.com>
Cc: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Cc: Wei6 Xu <wei6.xu@intel.com>
Cc: Yuanhao Xie <yuanhao.xie@intel.com>
This commit is contained in:
Jiaxin Wu 2024-06-26 13:41:45 +08:00 committed by mergify[bot]
parent 9ee5334796
commit 167e902624
1 changed files with 28 additions and 0 deletions
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28
UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c
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@ -46,6 +46,34 @@ GetSmmProfileData (
return SmmProfileDataHob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress; return SmmProfileDataHob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress;
} }
/**
Return if the Address is forbidden as SMM communication buffer.
@param[in] Address the address to be checked
@return TRUE The address is forbidden as SMM communication buffer.
@return FALSE The address is allowed as SMM communication buffer.
**/
BOOLEAN
IsSmmCommBufferForbiddenAddress (
IN UINT64 Address
)
{
EFI_PEI_HOB_POINTERS Hob;
Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
while (Hob.Raw != NULL) {
if ((Address >= Hob.ResourceDescriptor->PhysicalStart) && (Address < Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength)) {
return FALSE;
}
Hob.Raw = GET_NEXT_HOB (Hob);
Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
}
return TRUE;
}
/** /**
Build Memory Region from ResourceDescriptor HOBs by excluding Logging attribute range. Build Memory Region from ResourceDescriptor HOBs by excluding Logging attribute range.